feat: add 'hermes claw migrate' command + migration docs

- Add hermes_cli/claw.py with full CLI migration handler:
  - hermes claw migrate (interactive migration with confirmation)
  - --dry-run, --preset, --overwrite, --skill-conflict flags
  - --source for custom OpenClaw path
  - --yes to skip confirmation
  - Clean formatted output matching setup wizard style

- Fix Python 3.11+ @dataclass compatibility bug in dynamic module loading:
  - Register module in sys.modules before exec_module()
  - Fixes both setup.py (PR #981) and new claw.py

- Add 16 tests in tests/hermes_cli/test_claw.py covering:
  - Script discovery (project root, installed, missing)
  - Command routing
  - Dry-run, execute, cancellation, error handling
  - Preset/secrets behavior, report formatting

- Documentation updates:
  - README.md: Add 'hermes claw migrate' to Getting Started, new Migration section
  - docs/migration/openclaw.md: Full migration guide with all options
  - SKILL.md: Add CLI Command section at top of openclaw-migration skill

README.md

@@ -55,6 +55,7 @@ hermes tools        # Configure which tools are enabled
 hermes config set   # Set individual config values
 hermes gateway      # Start the messaging gateway (Telegram, Discord, etc.)
 hermes setup        # Run the full setup wizard (configures everything at once)
+hermes claw migrate # Migrate from OpenClaw (if coming from OpenClaw)
 hermes update       # Update to the latest version
 hermes doctor       # Diagnose any issues
 ```
@@ -87,6 +88,35 @@ All documentation lives at **[hermes-agent.nousresearch.com/docs](https://hermes
 
 ---
 
+## Migrating from OpenClaw
+
+If you're coming from OpenClaw, Hermes can automatically import your settings, memories, skills, and API keys.
+
+**During first-time setup:** The setup wizard (`hermes setup`) automatically detects `~/.openclaw` and offers to migrate before configuration begins.
+
+**Anytime after install:**
+
+```bash
+hermes claw migrate              # Interactive migration (full preset)
+hermes claw migrate --dry-run    # Preview what would be migrated
+hermes claw migrate --preset user-data   # Migrate without secrets
+hermes claw migrate --overwrite  # Overwrite existing conflicts
+```
+
+What gets imported:
+- **SOUL.md** — persona file
+- **Memories** — MEMORY.md and USER.md entries
+- **Skills** — user-created skills → `~/.hermes/skills/openclaw-imports/`
+- **Command allowlist** — approval patterns
+- **Messaging settings** — platform configs, allowed users, working directory
+- **API keys** — allowlisted secrets (Telegram, OpenRouter, OpenAI, Anthropic, ElevenLabs)
+- **TTS assets** — workspace audio files
+- **Workspace instructions** — AGENTS.md (with `--workspace-target`)
+
+See `hermes claw migrate --help` for all options, or use the `openclaw-migration` skill for an interactive agent-guided migration with dry-run previews.
+
+---
+
 ## Contributing
 
 We welcome contributions! See the [Contributing Guide](https://hermes-agent.nousresearch.com/docs/developer-guide/contributing) for development setup, code style, and PR process.